Hello,
First, Welcome on StrongFirst !
How many PU can you do at the moment ?
some plyo push ups as well
I do not think they are very necessary to improve your PU number. They have very specific uses: explosivity in MA, hypertrophy (when properly programmed with other contraction regimen)
Plus, doing them with perfect form require more strength than it appears. Indeed, it requires a great core / abs work to maintain a straight position and not bending / arching back and lumbars.
want to progress in One Arm push ups by doing archer
Getting good at strict OAPU will lead you to a good number of standard PU, IMO. So maybe you could focus on doing them and their progression. OAPU strongly engage lats and core.
IMO, you would progress far faster than first focusing on standard PU. Then, PU with feet elevated. Then, negative PU. Then partial PU. Then full OAPU.
Finally, GTG is based on the principle of splitting the sets throughout the day. So, as long as you feel fresh, then work on your moves. As soon as you feel tired, sore or whatever, it is the body signal to stop the training for the day.
Kind regards,
Pet'